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How to create a bootable uefi usb drive for bios updates

How to create a bootable usb drive

(for bios updates)

We know this is an off topic post for our site, but when you have to perform bios updates and spend ages googling the topic only to find loads of bad posts with wrong information we decided to make our own!

IMPORTANT!

Only update your BIOS if system is unstable or bug solutions correspond with your
needs. Flashing BIOS incorrectly has risk to damage your system. Please check the
guide and follow all of steps. ( we take no responsibility for and damage or loss of files etc resulting from the use of this guide it is only provided as a reference!)
Things to prepare:
– USB 2.0 flash drive.

Method:

1. Connect the USB flash drive.2. Open an elevated command prompt.3. In the elevated command prompt, type the commands below one at a time and press Enter after each one.

diskpart

list disk

4. Make note of the Disk # (ex: Disk 4) for the USB flash drive.

Warning

It is critical that you use the correct disk #. If you do not, then you could delete the wrong drive below and lose everything on it.

5. In the elevated command prompt, type the commands below one at a time and press Enter after each one.

NOTE:Substitute # in the first command with the actual disk # from step 4 above. For example: select disk 4

select disk #

detail disk (this is to verify that you selected the correct disk before using “clean” below)

clean

create partition primary

format fs=fat32 quick

active

assign

list volume

exit

Once you’ve prepared the above download the Efi usb files from here: Download_efifiles.zip and copy them to {usb drive}/Efi/ ( your usb will not be bootable without these files!)

Extract the files from [efifiles.zip] to the root directory of your USB drive
(should be formatted to FAT32).

Note1: Please place the EFI folder to the correct path, or it will not be bootable
correctly.Note2: The following files should be in X:\EFI\BOOT (replace X with the dive letter
of your USB drive):
Bootx64.efi
Shellx64.efi
Shell.efi
startup.nsh

Download the correct BIOS files for your update and add them to the USB drive.

Once thats all done reboot your computer and disable “Secure Boot mode”, then save and exit ( this will reboot computer again.)